They do, but they are screwed permanently on the existing bases and are not detachable like the above.
Very neat, please so can you post more detailed photos so that this can be copied.
Wasted 220 euro on recknagel. The Zeigler will work if you want to pay a fortune to get the bases changed as well plus get the barrels re-ceracoated
Much cheaper to do what I did.
I'm fairly sure that the Ziegler ones that I have seen in the past were detachable and simply clipped into the standard claw mount bases